Monodisperse nickel nanoparticles prepared from a monosurfactant system and their magnetic properties

Monodisperse nickel nanoparticles around 3.7 nm were prepared by reduction of Ni(acac)(2)(acac = acetylacetone) with sodium tetrahydridoborate in a monosurfactant system, in which hexadecylamine (HDA) serves as stabilizer and solvent, without any further size-selective process. The Ni particles show the characteristic of a superparamagnet with a blocking temperature of 12 K. The magnetic anisotropy distribution function of the nanoparticles has been extracted from the temperature dependence of magnetization.Chemistry, PhysicalMaterials Science, MultidisciplinarySCI(E)EI0ARTICLE71510-15121